Worst air pollution Chula Vista, today and tomorrow
Today (15 July): Air quality in Chula Vista is fair. AQI, PM10, and O3 are fair; PM2.5, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (PM10: 29.9/100).
Tomorrow (16 July 2026): Air quality in Chula Vista is fair. All pollutants stay as today. Pollution peaks around 8:00 AM (O3: 28.0/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Chula Vista's air quality reflects its position in the South Bay coastal corridor of San Diego County, with Pacific Ocean sea breezes generally providing good ventilation along the Otay Mesa coastal plain. The primary local concerns are cross-border industrial and vehicle emissions from the Tijuana-Tecate manufacturing corridor immediately to the south, vehicle traffic on I-805 and SR-125, and occasional wildfire smoke from eastern San Diego County's interior mountains.
Today - 15 July | Pollution peaks at 08:00
AQI:
Fair
29.9/100
PM2.5 (fine particles):
Good
17.4/100
PM10 (coarse particles):
Fair
29.9/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
26.9/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
2.9/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 08:00
AQI:
Fair
28.0/100
PM2.5 (fine particles):
Good
11.8/100
PM10 (coarse particles):
Fair
21.5/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Fair
28.0/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
2.4/100
Pollen forecast in Chula Vista
View pollen forecastFrequently Asked Questions
Is air quality bad in Chula Vista right now?
On 15 July 2026, overall air quality in Chula Vista is fair. AQI is the main air quality indicator at 29.9/100. Pollution peaks around 8:00 AM (PM10: 29.9/100).
Will air quality be worse tomorrow in Chula Vista?
On 16 July 2026, air quality conditions in Chula Vista will be similar to today, with AQI forecast at fair at 28.0/100. Pollution peaks around 8:00 AM (O3: 28.0/100).
When is air pollution at its worst in Chula Vista?
Air quality in Chula Vista shifts across the year, as winter typically brings the cleanest stretch, once occasional rain clears the basin; by contrast, hot, sunny summer conditions drive persistent ozone problems, compounded by wildfire smoke risk into early autumn. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Chula Vista based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app